BLOWER MOTOR RESISTOR
DESCRIPTION
The blower motor resistor is mounted to the bot-
tom of the heater-A/C housing on the passenger side
of the vehicle under the instrument panel. It can be
accessed for service by removing the heater-A/C
housing kick cover.
OPERATION
The resistor has multiple resistor wires, each of
which reduce the current flow to the blower motor, to
change the blower motor speed. The blower motor
switch directs the ground path through the correct
resistor wire to obtain the selected speed. When the
highest blower speed is selected, the blower motor
switch connects the blower motor directly to ground,
bypassing the blower motor resistor.
The blower motor resistor cannot be repaired and,
if faulty or damaged, it must be replaced.
BLOWER MOTOR SWITCH
DESCRIPTION
The heater-only or heater-A/C blower motor is con-
trolled by a four position rotary-type blower motor
switch, mounted in the heater-A/C control panel. The
switch allows the selection of one of four blower
motor speeds, but can only be turned off by selecting
the Off position with the heater-A/C mode control
switch knob.
OPERATION
The blower motor switch directs the blower motor
ground path through the mode control switch to the
blower motor resistor, or directly to ground, as
required to achieve the selected blower motor speed.
The blower motor switch cannot be repaired and, if
faulty or damaged, the entire heater-only or heater-
A/C control unit must be replaced.
COMPRESSOR
DESCRIPTION
The
air
conditioning
system
uses
a
Sanden
SD7H15 seven cylinder, reciprocating wobble plate-
type compressor on all models. This compressor has a
fixed displacement of 150 cubic centimeters (9.375
cubic inches), and has both the suction and discharge
ports located on the cylinder head. A label identifying
the use of R-134a refrigerant is located on the com-
pressor.
OPERATION
The compressor is driven by the engine through an
electric clutch, drive pulley and belt arrangement.
The compressor is lubricated by refrigerant oil that is
circulated throughout the refrigerant system with the
refrigerant.
The compressor draws in low-pressure refrigerant
vapor from the evaporator through its suction port. It
then compresses the refrigerant into a high-pressure,
high-temperature refrigerant vapor, which is then
pumped to the condenser through the compressor dis-
charge port.
The compressor cannot be repaired. If faulty or
damaged, the entire compressor assembly must be
replaced. The compressor clutch, pulley and clutch
coil are available for service.
COMPRESSOR CLUTCH
DESCRIPTION
The compressor clutch assembly consists of a sta-
tionary electromagnetic coil, a hub bearing and pul-
ley assembly, and a clutch plate (Fig. 2). The
electromagnetic coil unit and the hub bearing and
pulley assembly are each retained on the nose of the
compressor front housing with snap rings. The clutch
plate is keyed to the compressor shaft and secured
with a nut. These components provide the means to
engage and disengage the compressor from the
engine serpentine accessory drive belt.
OPERATION
When the clutch coil is energized, it magnetically
draws the clutch into contact with the pulley and
drives the compressor shaft. When the coil is not
energized, the pulley freewheels on the clutch hub
Fig. 2 Compressor Clutch - Typical
1 – CLUTCH PLATE
2 – SHAFT KEY
3 – PULLEY
4 – COIL
5 – CLUTCH SHIMS
6 – SNAP RING
7 – SNAP RING
XJ
HEATING AND AIR CONDITIONING
24 - 3
DESCRIPTION AND OPERATION (Continued)
Содержание Cherokee 2000
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Страница 100: ...Installer D 144 Installer W 262 3 64 TUBE 181 AND 186 FBI AXLE XJ SPECIAL TOOLS Continued...
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Страница 639: ...Fig 8 Engine Compartment Components LHD XJ 8W 90 CONNECTOR LOCATIONS 8W 90 15 DESCRIPTION AND OPERATION Continued...
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Страница 641: ...Fig 10 Left Engine Compartment 4 0L Engine LHD XJ 8W 90 CONNECTOR LOCATIONS 8W 90 17 DESCRIPTION AND OPERATION Continued...
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Страница 647: ...Fig 16 2 5L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 23 DESCRIPTION AND OPERATION Continued...
Страница 648: ...Fig 17 4 0L Engine 8W 90 24 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
Страница 649: ...Fig 18 4 0L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 25 DESCRIPTION AND OPERATION Continued...
Страница 650: ...Fig 19 Transmission Connectors 2 5L Engine 8W 90 26 8W 90 CONNECTOR LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
Страница 651: ...Fig 20 Transmission Connectors 4 0L Engine XJ 8W 90 CONNECTOR LOCATIONS 8W 90 27 DESCRIPTION AND OPERATION Continued...
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Страница 684: ...Fig 14 Instrument Panel to Body Harness Splices 8W 95 18 8W 95 SPLICE LOCATIONS XJ DESCRIPTION AND OPERATION Continued...
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Страница 1023: ...Fig 33 Switch Valve Torque Converter Unlocked XJ AUTOMATIC TRANSMISSION 30RH 21 115 DESCRIPTION AND OPERATION Continued...
Страница 1024: ...Fig 34 Switch Valve Torque Converter Locked 21 116 AUTOMATIC TRANSMISSION 30RH XJ DESCRIPTION AND OPERATION Continued...
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Страница 1117: ...HYDRAULIC FLOW IN MANUAL SECOND XJ AUTOMATIC TRANSMISSION 30RH 21 209 SCHEMATICS AND DIAGRAMS Continued...
Страница 1118: ...HYDRAULIC FLOW IN MANUAL LOW 21 210 AUTOMATIC TRANSMISSION 30RH XJ SCHEMATICS AND DIAGRAMS Continued...
Страница 1119: ...HYDRAULIC FLOW IN REVERSE XJ AUTOMATIC TRANSMISSION 30RH 21 211 SCHEMATICS AND DIAGRAMS Continued...
Страница 1243: ...Fig 299 Upper Body Components XJ AW 4 AUTOMATIC TRANSMISSION 21 335 DISASSEMBLY AND ASSEMBLY Continued...
Страница 1247: ...AW 4 BUSHING AND PISTON CLEARANCE XJ AW 4 AUTOMATIC TRANSMISSION 21 339 SPECIFICATIONS Continued...
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Страница 1327: ...SPECIFICATIONS TORQUE CHART DESCRIPTION TORQUE Lug Nut 1 2 X 20 with 60 Cone 115 150 N m 85 115 ft lbs XJ TIRES AND WHEELS 22 11...
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Страница 1406: ...CARGO AREA FLOOR PAN 23 78 BODY XJ SPECIFICATIONS Continued...
Страница 1407: ...ROOF AND D PILLAR XJ BODY 23 79 SPECIFICATIONS Continued...
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Страница 1417: ...FRONT INNER FENDER AND RADIATOR CLOSURE PANEL XJ BODY 23 89 SPECIFICATIONS Continued...
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Страница 1440: ...BODY SEALING LOCATIONS APPLICATION METHODS 23 112 BODY XJ SPECIFICATIONS Continued...
Страница 1441: ...COWL AND DASH PANEL XJ BODY 23 113 SPECIFICATIONS Continued...
Страница 1442: ...DASH PANEL AND FLOOR PAN 23 114 BODY XJ SPECIFICATIONS Continued...
Страница 1443: ...FLOOR PAN XJ BODY 23 115 SPECIFICATIONS Continued...
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Страница 1451: ...LIFTGATE OPENING XJ BODY 23 123 SPECIFICATIONS Continued...
Страница 1452: ...STRUCTURAL ADHESIVE LOCATIONS LEFT QUARTER PANEL 23 124 BODY XJ SPECIFICATIONS Continued...
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